Got the XYZ servos mounted and tuned. The first video shows a test program with some drilling G-codes. Rapids are set at 5000mm/min with around 400 mm/s^2 accelerations. Following errors stay below 0.02 mm. The second video shows a 40 mm face-mill at 3000 rpm cutting a 20 mm wide aluminium bar with 1 mm depth of cut and 500 mm/min feed. We think this is pretty good for this size of minimill. The stability and sound will not be as nice as this without linear rails, ballscrews, and a good spindle.